I have a Dewalt Spline drive hammer. It is big and heavy but knocks out big jobs in a hurry. I also have a Bosch SDS Plus which is variable speed. It handles a 3" thinwall core easily. I also have a 1/2" Jacobs chuck for the Bosch so I can run a 3/4" ship auger in the drill only mode or use smaller straight shank masonry bits. It is much easier to run a 1" brick chisel or bullpoint with the Bosch and it works nearly as fast at chiseling as the bigger Dewalt. The Dewalt is not variable speed. I would not buy a rotary hammer without variable speed if I had it to do over again. My only regret about the Bosch is I didn't get the model with reverse. That would come in handy when drilling in wood with the auger.
